Special tool for transmission shaft of large machine

Abstract

The utility model relates to the technical field of large machine maintenance auxiliary tools, in particular to a tool special for a large machine transmission shaft, which comprises a stand column, a jack, a rotating sleeve, a swing device and a lifting device, the upper end of the stand column and the lower end of the jack are fixedly installed together, and the rotating sleeve is sleeved on the outer side of the lower portion of the stand column. The device is reasonable and compact in structure, the jack is arranged, a top cap of the jack can play a role in fixing the stand column after tightly jacking a vehicle body, so that the stand column is more convenient to fix and disassemble, the swing device is arranged, when the supporting plate is pulled, the connecting seat can rotate and translate, the supporting plate can be folded and unfolded, and the device is convenient to use. The lifting device can rotate along the rotating sleeve and can also rotate along the rotating sleeve, the lifting device can be rapidly moved to the target position, the operation difficulty is reduced, the working efficiency is improved, the supporting plate and the supporting groove are arranged, the transmission shaft can be limited, accidents caused after the transmission shaft falls off in the moving process of the supporting plate are avoided, and the safety in the overhauling process can be improved.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tooling technology for large machine maintenance, and is a special tooling for large machine drive shafts. Background Technology

[0002] With the continuous increase in the operating speed of railway trains and the continuous increase in the operating mileage of railway lines, self-propelled special equipment is playing an increasingly important role in the safe transportation and production of railways. It is adopting a large number of new processes, new technologies and new equipment to gradually improve production efficiency and continuously reduce the labor intensity of employees, thereby adapting to the changes brought about by the continuous reform and development of railways.

[0003] The technology and performance of self-propelled special equipment such as tamping cars, stabilizing cars, grinding cars, track cars, and overhead contact line operation cars in railway engineering and power supply specialties have developed rapidly to meet the requirements of high reliability, high stability, and high smoothness of high-speed railways. The lower part of the car body is generally equipped with transmission components such as drive shafts, brake beams, hydraulic pumps, and hydraulic motors. During operation or work on railway lines, the transmission components are subjected to huge axial forces, radial pressures, and high-frequency vibrations, which can easily lead to safety hazards such as component cracking and weld failure. Every year, the car needs to be disassembled and inspected for flaw detection and dynamic balancing tests. The welds and fork sections of the lower drive shaft are inspected for flaw detection, the clearance of the telescopic fork is checked, the welding condition of the balance block is checked, and grease is added.

[0004] During the disassembly and maintenance of the drive shaft and brake beam of the self-propelled equipment, due to the limited space under the vehicle body, it is not possible to use electric or pneumatic lifting machinery and equipment such as elevators. After the drive shaft, brake beam, hydraulic pump, and hydraulic motor are transported to the maintenance platform, two to three employees work together to carry the drive shaft, brake beam, hydraulic pump, and hydraulic motor by hand and shoulder and install them onto the output flange of the gearbox or axle gearbox.

[0005] When using a hydraulic lifting bracket for automotive transmissions, only a small number of models can achieve the function of lifting components. Due to the limitations of the vehicle body structure of the self-propelled equipment, the maintenance space under the vehicle is extremely limited. There are many basic brake lines and rods, making horizontal alignment and lateral movement impossible, and there are also problems with clamping large components.

[0006] In addition, the drive shaft, brake beam, hydraulic pump, and hydraulic motor weigh between 70 and 180 kg, have irregular shapes and large dimensions, resulting in high labor intensity and low work efficiency for employees during operation. They occupy maintenance positions for a long time, affecting the maintenance progress, and pose serious occupational and personal safety risks.

[0007] When using hydraulic or mechanical jacks, only a single lifting operation can be completed. Clamping, translating, and aligning the drive shaft and brake beam of the large machine requires the cooperation of 3 to 4 people. Multiple alignments under the vehicle body are necessary, and the operation is cumbersome and heavy due to interference from irregular parts such as wheelsets, axles, and gearbox housings. Furthermore, the area under the large machine and railcar is a maintenance pit, and the stroke of hydraulic or mechanical jacks is relatively limited. Using too many wooden blocks to increase the height can easily cause the hydraulic or mechanical jacks to become unstable, posing a safety risk of injury to workers. Therefore, it is not convenient to promote their use at maintenance sites.

[0008] To address the challenges of installing and disassembling large components or long rods and parts with large dimensions, such as drive shafts, brake beams, hydraulic pumps, and hydraulic motors, during the maintenance of self-propelled special equipment in railway engineering and power supply departments, it is both necessary and urgent to develop a special tooling fixture for large machine drive shafts and brake beams. Summary of the Invention

[0009] This utility model provides a special tooling for the transmission shaft of a large machine, which overcomes the shortcomings of the prior art and can effectively solve the problems of time-consuming and labor-intensive disassembly and assembly of long rods or components of existing large machines, as well as the high safety risks.

[0010] The technical solution of this utility model is achieved through the following measures: A special tooling for a large machine drive shaft includes a column, a jack, a rotating sleeve, a swinging device, and a lifting device. The upper end of the column is fixedly installed together with the lower end of the jack. A rotating sleeve is fitted on the outer side of the lower part of the column. A swinging device is provided on the outer side of the rotating sleeve. The swinging device includes a hinge mechanism and several connecting seats spaced apart from the inside to the outside along the radial direction of the rotating sleeve. The ends of the outermost and innermost connecting seats of the rotating sleeve are fixedly installed together. Two adjacent connecting seats are rotatably installed together through the hinge mechanism. A support plate is fixedly installed on the upper side of the outermost connecting seat. A lifting device is provided on the upper side of the support plate. Two support plates are fixedly installed on the upper side of the lifting device at intervals on the left and right. Each support plate has an arc-shaped support groove that runs through the left and right and opens upwards on the upper side.

[0011] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0012] The aforementioned connecting seats can be arranged in three intervals from the inside to the outside. The hinge mechanism includes a first hinge assembly and a second hinge assembly with identical structures. The first hinge assembly includes a first hinge sleeve, a second hinge sleeve, a first connecting bolt, a second connecting bolt, an upper connecting plate, and a lower connecting plate. The innermost connecting seat has a vertically arranged first hinge sleeve fixedly installed at the end away from the rotating sleeve. The middle connecting seat has a second hinge sleeve fixedly installed at the end near the rotating sleeve. The upper part of the first connecting bolt passes through the first hinge sleeve and is screwed with a first connecting nut. The upper part of the second connecting bolt passes through the second hinge sleeve and is screwed with a second connecting nut. Corresponding to the first connecting nut and the first hinge... A first upper support sleeve is fitted on the outer side of the upper part of the first connecting bolt at the position between the two sleeves. A first lower support sleeve is fitted on the outer side of the lower part of the first connecting bolt at the lower end of the first hinge sleeve. A second upper support sleeve is fitted on the outer side of the upper part of the second connecting bolt at the position between the second connecting nut and the second hinge sleeve. A second lower support sleeve is fitted on the outer side of the lower part of the second connecting bolt at the lower end of the second hinge sleeve. An upper connecting plate is fixedly installed between the first upper support sleeve and the second upper support sleeve. A lower connecting plate is fixedly installed between the first lower support sleeve and the second lower support sleeve. The middle connecting seat and the outermost connecting seat are hinged together by the second hinge assembly.

[0013] The aforementioned first hinge assembly may further include a first thrust bearing and a second thrust bearing. The upper and lower ends of the first upper support sleeve and the upper and lower ends of the first lower support sleeve are each provided with a first thrust bearing fitted on the outside of the first connecting bolt. The upper and lower ends of the second upper support sleeve and the upper and lower ends of the second lower support sleeve are each provided with a second thrust bearing fitted on the outside of the second connecting bolt.

[0014] The outermost connecting seat can be fixedly installed with a fixing sleeve at the end away from the rotating sleeve. The upper side of the support plate corresponding to the position of the fixing sleeve is provided with a connecting hole that runs through the top and bottom. The fixing sleeve is provided with a fixing bolt with a fixing nut screwed into it after passing through the connecting hole at the top.

[0015] The innermost connecting seat can be a vertically arranged plate-like structure, and a reinforcing rib fixed to the upper part of the innermost connecting seat and fixed to the outside of the rotating sleeve.

[0016] A base plate can be fixedly installed at the lower end of the aforementioned column. A third thrust bearing fitted on the outside of the column is provided between the base plate and the rotating sleeve. A locking nut is screwed onto the outside of the column corresponding to the position above the rotating sleeve. A fourth thrust bearing fitted on the outside of the column is provided between the locking nut and the upper end of the rotating sleeve. A mounting base is fixedly installed on the outer side of the upper end of the column corresponding to the position above the locking nut. The jack is mounted on the upper side of the mounting base.

[0017] This utility model has a reasonable and compact structure. By setting up a jack, the jack cap can fix the column after it is tightened against the vehicle body, making it easier to fix and disassemble the column. The swing device allows the connecting seat to rotate and translate when the pallet is pulled, enabling the pallet to fold and unfold. It can also rotate along the rotating sleeve, allowing the lifting device to be quickly moved to the target position, reducing the difficulty of operation and improving work efficiency. The support plate and support groove can limit the transmission shaft, preventing accidents caused by the transmission shaft falling off during the movement of the pallet, thus improving safety during maintenance. Attached Figure Description

[0018] Appendix Figure 1 These are schematic diagrams of the main structure of embodiments one to six of this utility model.

[0019] Appendix Figure 2 These are top sectional view structural diagrams of embodiments one to six of this utility model.

[0020] Appendix Figure 3 This is a right-side structural schematic diagram of the lifting device in embodiments one to six of this utility model.

[0021] The codes in the attached diagram are as follows: 1 for column, 2 for jack, 3 for lifting device, 4 for rotating sleeve, 5 for connecting seat, 6 for support plate, 7 for support plate, 8 for support groove, 9 for second hinge assembly, 10 for first hinge sleeve, 11 for second hinge sleeve, 12 for first connecting bolt, 13 for second connecting bolt, 14 for upper connecting plate, 15 for lower connecting plate, 16 for first connecting nut, 17 for second connecting nut, 18 for first upper support sleeve, 19 for first lower support sleeve, 20 for second upper support sleeve, 21 for second lower support sleeve, 22 for first thrust bearing, 23 for second thrust bearing, 24 for fixing sleeve, 25 for fixing nut, 26 for fixing bolt, 27 for reinforcing rib, 28 for base plate, 29 for third thrust bearing, 30 for fourth thrust bearing, 31 for locking nut, and 32 for mounting base. Detailed Implementation

[0022] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0023] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0024] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0025] Example 1: As shown in the attached document Figure 1 , 2 As shown in Figure 3, the special tooling for the large machine drive shaft includes a column 1, a jack 2, a rotating sleeve 4, a swing device, and a lifting device 3. The upper end of the column 1 is fixedly installed together with the lower end of the jack 2. The rotating sleeve 4 is fitted on the lower outer side of the column 1. The swing device is provided on the outer side of the rotating sleeve 4. The swing device includes a hinge mechanism and several connecting seats 5 arranged at intervals from the inside to the outside along the radial direction of the rotating sleeve 4. The ends of the outermost and innermost connecting seats 5 of the rotating sleeve 4 are fixedly installed together. Two adjacent connecting seats 5 are rotatably installed together through the hinge mechanism. A support plate 6 is fixedly installed on the upper side of the outermost connecting seat 5. The lifting device 3 is provided on the upper side of the support plate 6. Two support plates 7 are fixedly installed on the upper side of the lifting device 3 at intervals on the left and right. Each support plate 7 has an arc-shaped support groove 8 that runs through the left and right and opens upwards on the upper side.

[0026] According to the requirements, the lifting device 3 is a hydraulic scissor lift mounted on the pallet 6, and the jack 2 is a known technology. During use, by setting up the jack 2, the top cap of the jack 2 can secure the column 1 after pressing against the vehicle body, making the fixing and disassembly of the column 1 more convenient. The swing device allows the connecting seat 5 to rotate and translate when the pallet 6 is pulled, enabling the pallet 6 to fold and unfold. It can also rotate along the rotating sleeve 4, allowing the lifting device 3 to be quickly moved to the target position, reducing operational difficulty and improving work efficiency. The support plate 7 and support groove 8 limit the transmission shaft, preventing accidents caused by the transmission shaft falling off during the movement of the pallet 6, thus improving safety during maintenance.

[0027] In use, the weight of the railway maintenance machinery such as tamping cars, cleaning cars, and stabilizing cars is used to place column 1 between the car body and the ground of the maintenance platform. Rubber plates for anti-slip are installed between the lower end of column 1 and the ground, and between the top cap of jack 2 and the side beam of the car body. By operating jack 2, the lower end of column 1 and the top cap of jack 2 are pressed against the ground and the side beam of the car body, respectively, thereby fixing column 1. Column 1 can bear the weight of large components such as drive shafts and also serves as a rotating platform.

[0028] Then, manually rotate and pull the pallet 6 to make it rotate and move in the horizontal plane, aligning the support groove 8 with the position of the drive shaft that needs to be repaired. Then operate the lifting device 3 to make the inner wall of the support groove 8 contact the outer side of the drive shaft. After the drive shaft is disassembled, operate the lifting device 3 again to lower the drive shaft, and then pull the pallet 6 to rotate and move it to the side of the vehicle body. The drive shaft can then be hoisted to the repair station. When installing the repaired drive shaft, simply follow the reverse order of the above operation process.

[0029] The aforementioned special tooling for the large machine drive shaft can be further optimized and / or improved according to actual needs:

[0030] Example 2: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown, three connecting seats 5 are spaced apart from the inside to the outside. The hinge mechanism includes a first hinge assembly and a second hinge assembly 9 with identical structures. The first hinge assembly includes a first hinge sleeve 10, a second hinge sleeve 11, a first connecting bolt 12, a second connecting bolt 13, an upper connecting plate 14, and a lower connecting plate 15. The first hinge sleeve 10 is fixedly installed vertically at the end of the innermost connecting seat 5 away from the rotating sleeve 4. The second hinge sleeve 11 is fixedly installed at the end of the middle connecting seat 5 near the rotating sleeve 4. The upper part of the first connecting bolt 12 passes through the first hinge sleeve 10 and is screwed with a first connecting nut 16. The upper part of the second connecting bolt 13 passes through the second hinge sleeve 11 and is screwed with a second connecting nut 17. The first connecting nut 16 and the first hinge sleeve 14 are respectively connected to the first hinge sleeve 15. A first upper support sleeve 18 is fitted on the outer side of the upper part of the first connecting bolt 12 at the position between 0 and 0. A first lower support sleeve 19 is fitted on the outer side of the lower part of the first connecting bolt 12 at the lower end of the first hinge sleeve 10. A second upper support sleeve 20 is fitted on the outer side of the upper part of the second connecting bolt 13 at the position between the second connecting nut 17 and the second hinge sleeve 11. A second lower support sleeve 21 is fitted on the outer side of the lower part of the second connecting bolt 13 at the lower end of the second hinge sleeve 11. An upper connecting plate 14 is fixedly installed between the first upper support sleeve 18 and the second upper support sleeve 20. A lower connecting plate 15 is fixedly installed between the first lower support sleeve 19 and the second lower support sleeve 21. The middle connecting seat 5 and the outermost connecting seat 5 are hinged together by the second hinge assembly 9.

[0031] As required, the upper connecting plate 14 and the lower connecting plate 15 are both set in pairs, which can improve the strength of the first hinge assembly. During use, the setting of the support sleeve and the connecting plate allows the angle between the connecting seat 5 and the connecting plate to change when the pallet 6 is pulled. That is, the connecting seat 5 and the connecting plate can achieve a folding and unfolding effect. This allows the connecting seat 5 and the connecting plate to flexibly fold and unfold when the pallet 6 is pulled to the disassembly or assembly position during the disassembly or assembly of the drive shaft, reducing the difficulty of positioning the pallet 6 and improving the transfer efficiency of the drive shaft. After use, the connecting seat 5 and the connecting plate can also be folded together, which can reduce the footprint and make it more convenient to store the special tooling for large machine drive shafts.

[0032] Example 3: As an optimization of the above examples, as shown in the appendix. Figure 1As shown, the first hinge assembly also includes a first thrust bearing 22 and a second thrust bearing 23. The upper and lower ends of the first upper support sleeve 18 and the upper and lower ends of the first lower support sleeve 19 are each provided with a first thrust bearing 22 fitted on the outside of the first connecting bolt 12. The upper and lower ends of the second upper support sleeve 20 and the upper and lower ends of the second lower support sleeve 21 are each provided with a second thrust bearing 23 fitted on the outside of the second connecting bolt 13.

[0033] According to the requirements, the first thrust bearing 22 and the second thrust bearing 23 are both existing known technologies. The first thrust bearing 22 is installed between the upper end of the first upper support sleeve 18 and the lower end of the first connecting nut 16, between the lower end of the first upper support sleeve 18 and the upper end of the first hinge sleeve 10, between the upper end of the first lower support sleeve 19 and the lower end of the first hinge sleeve 10, and between the lower end of the first lower support sleeve 19 and the head of the first connecting bolt 12. The second thrust bearing 23 is installed between the upper end of the second upper support sleeve 20 and the lower end of the second connecting nut 17, between the lower end of the second upper support sleeve 20 and the upper end of the second hinge sleeve 11, between the upper end of the second lower support sleeve 21 and the lower end of the second hinge sleeve 11, and between the lower end of the second lower support sleeve 21 and the head of the second connecting bolt 13.

[0034] During use, the first thrust bearing 22 and the second thrust bearing 23 enable more flexible rotation between the connecting seats 5. After the drive shaft or brake beam is placed on the upper side of the lifting device 3, the connecting seat 5 can be easily rotated to achieve the telescopic effect of the connecting seat 5, thereby allowing the lifting device 3 and the drive shaft to move to the installation position or maintenance position, reducing the labor intensity of maintenance personnel and improving work efficiency.

[0035] Example 4: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown, the outermost connecting seat 5 is fixedly installed with a fixing sleeve 24 at the end away from the rotating sleeve 4. The upper side of the support plate 6 corresponding to the position of the fixing sleeve 24 is provided with a connecting hole that runs through the upper and lower parts. The fixing sleeve 24 is provided with a fixing bolt 26 that passes through the connecting hole at the top and is screwed with a fixing nut 25.

[0036] During use, this design facilitates the assembly and disassembly of the tray 6 and the connecting seat 5. After use, the connecting seat 5 can be folded together and stored after the tray 6 is removed, reducing the floor space occupied.

[0037] Example 5: As an optimization of the above examples, as shown in the appendix. Figure 1 , 2 As shown, the innermost connecting seat 5 is a vertically arranged plate-like structure, and the upper part of the innermost connecting seat 5 is fixed with a reinforcing rib 27 that is fixed together with the outer side of the rotating sleeve 4.

[0038] During use, this design can improve the strength of the connection between the connecting seat 5 and the rotating sleeve 4, and also enhance the strength of the connecting seat 5, ensuring the safety of the special tooling for the large machine drive shaft during use.

[0039] Example 6: As an optimization of the above examples, as shown in the appendix Figure 1 , 2 As shown, a base plate 28 is fixedly installed at the lower end of the column 1. A third thrust bearing 29, which is fitted on the outside of the column 1, is provided between the base plate 28 and the rotating sleeve 4. A locking nut 31 is screwed onto the outside of the column 1 at the position above the rotating sleeve 4. A fourth thrust bearing 30, which is fitted on the outside of the column 1, is provided between the locking nut 31 and the upper end of the rotating sleeve 4. A mounting base 32 is fixedly installed on the outer side of the upper end of the column 1 at the position above the locking nut 31. The jack 2 is mounted on the upper side of the mounting base 32.

[0040] According to the requirements, both the third thrust bearing 29 and the fourth thrust bearing 30 are existing known technologies. During use, this arrangement makes the rotating sleeve 4 rotate more smoothly and reduces wear. The fourth thrust bearing 30 also maintains a distance between the rotating sleeve 4 and the base plate 28, preventing friction between them and extending the service life of the special tooling for the large machine drive shaft. The locking nut 31 limits the position of the fourth thrust bearing 30, ensuring that the rotating sleeve 4 and the column 1 remain coaxial, preventing the lifting device 3 and drive shaft from falling off if the support plate 6 tilts.

[0041] The above technical features constitute various embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0042] The preferred embodiment of this utility model is used as follows: First, using the weight of the railway maintenance machinery such as tamping cars, cleaning cars, and stabilizing cars, the column 1 of the special tooling for the large machine drive shaft is placed between the car body and the ground of the maintenance platform. Rubber plates are installed between the column 1 and the ground, and between the top cap of the jack 2 and the side beam of the car body for anti-slip purposes. The jack 2 is operated so that the base plate 28 and the top cap of the jack 2 abut against the ground and the side beam of the car body, respectively, which serves to fix the column 1. The column 1 is used to bear the weight of large components such as the drive shaft and also serves as a rotating platform.

[0043] Place the drive shaft to be installed in the support groove 8, manually rotate and pull the pallet 6, the pallet 6 rotates and moves along the rotating sleeve 4 in the horizontal plane, transporting the drive shaft to be installed to the lower part of the vehicle body to the installation position, operate the lifting device 3 to raise the drive shaft to the optimal installation position (with a load capacity of about 150 kg), and then quickly install the drive shaft manually.

[0044] After the drive shaft disassembly and installation are completed, manually rotate and pull the pallet 6 to move it outside the vehicle body. Then, operate the jack 2 again to separate the top cap of the jack 2 from the side beam of the vehicle body. Remove the pallet 6 and fold the connecting seat 5 for storage.

Claims

1. A special tooling for a large machine drive shaft, characterized in that... It includes a column, a jack, a rotating sleeve, a swinging device, and a lifting device. The upper end of the column is fixedly installed together with the lower end of the jack. The rotating sleeve is fitted on the outer side of the lower part of the column. The swinging device is provided on the outer side of the rotating sleeve. The swinging device includes a hinge mechanism and several connecting seats spaced apart from the inside to the outside along the radial direction of the rotating sleeve. The ends of the outermost and innermost connecting seats of the rotating sleeve are fixedly installed together. Two adjacent connecting seats are rotatably installed together through the hinge mechanism. A support plate is fixedly installed on the upper side of the outermost connecting seat. A lifting device is provided on the upper side of the support plate. Two support plates are fixedly installed on the upper side of the lifting device at intervals on the left and right. Each support plate has an arc-shaped support groove that runs through the left and right and opens upwards on the upper side.

2. The special tooling for large machine drive shafts according to claim 1, characterized in that... Three connecting seats are spaced apart from the inside out. The hinge mechanism includes a first hinge assembly and a second hinge assembly with identical structures. The first hinge assembly includes a first hinge sleeve, a second hinge sleeve, a first connecting bolt, a second connecting bolt, an upper connecting plate, and a lower connecting plate. The first hinge sleeve is vertically mounted on the innermost connecting seat at the end away from the rotating sleeve. The second hinge sleeve is fixedly mounted on the middle connecting seat at the end near the rotating sleeve. The upper part of the first connecting bolt passes through the first hinge sleeve and is screwed with a first connecting nut. The upper part of the second connecting bolt passes through the second hinge sleeve and is screwed with a second connecting nut, corresponding to the first connecting nut and the first hinge sleeve. A first upper support sleeve is fitted on the outer side of the upper part of the first connecting bolt at the position between the two hinges. A first lower support sleeve is fitted on the outer side of the lower part of the first connecting bolt at the lower end of the first hinge sleeve. A second upper support sleeve is fitted on the outer side of the upper part of the second connecting bolt at the position between the second connecting nut and the second hinge sleeve. A second lower support sleeve is fitted on the outer side of the lower part of the second connecting bolt at the lower end of the second hinge sleeve. An upper connecting plate is fixedly installed between the first upper support sleeve and the second upper support sleeve. A lower connecting plate is fixedly installed between the first lower support sleeve and the second lower support sleeve. The middle connecting seat and the outermost connecting seat are hinged together by the second hinge assembly.

3. The special tooling for large machine drive shafts according to claim 2, characterized in that... The first hinge assembly also includes a first thrust bearing and a second thrust bearing. The upper and lower ends of the first upper support sleeve and the upper and lower ends of the first lower support sleeve are each provided with a first thrust bearing fitted on the outside of the first connecting bolt. The upper and lower ends of the second upper support sleeve and the upper and lower ends of the second lower support sleeve are each provided with a second thrust bearing fitted on the outside of the second connecting bolt.

4. The special tooling for large machine drive shafts according to claim 2 or 3, characterized in that... The outermost connecting seat has a fixed sleeve fixedly installed at the end away from the rotating sleeve. The upper side of the support plate corresponding to the fixed sleeve position has a connecting hole that runs through the top and bottom. The fixed sleeve has a fixing bolt with a fixing nut screwed into it after passing through the connecting hole at the top.

5. The special tooling for large machine drive shafts according to claim 2 or 3, characterized in that... The innermost connecting seat is a vertically arranged plate-like structure, and the upper part of the innermost connecting seat is fixed with a reinforcing rib that is fixed together with the outer side of the rotating sleeve.

6. The special tooling for large machine drive shafts according to claim 4, characterized in that... The innermost connecting seat is a vertically arranged plate-like structure, and the upper part of the innermost connecting seat is fixed with a reinforcing rib that is fixed together with the outer side of the rotating sleeve.

7. The special tooling for large machine transmission shafts according to claim 1, 2, 3, or 6, characterized in that... A base plate is fixedly installed at the lower end of the column. A third thrust bearing is fitted on the outside of the column between the base plate and the rotating sleeve. A locking nut is screwed onto the outside of the column corresponding to the position above the rotating sleeve. A fourth thrust bearing is fitted on the outside of the column between the locking nut and the upper end of the rotating sleeve. A mounting base is fixedly installed on the upper outside of the column corresponding to the position above the locking nut. The jack is mounted on the upper side of the mounting base.

8. The special tooling for large machine transmission shafts according to claim 4, characterized in that... A base plate is fixedly installed at the lower end of the column. A third thrust bearing is fitted on the outside of the column between the base plate and the rotating sleeve. A locking nut is screwed onto the outside of the column corresponding to the position above the rotating sleeve. A fourth thrust bearing is fitted on the outside of the column between the locking nut and the upper end of the rotating sleeve. A mounting base is fixedly installed on the upper outside of the column corresponding to the position above the locking nut. The jack is mounted on the upper side of the mounting base.

9. The special tooling for large machine drive shafts according to claim 5, characterized in that... A base plate is fixedly installed at the lower end of the column. A third thrust bearing is fitted on the outside of the column between the base plate and the rotating sleeve. A locking nut is screwed onto the outside of the column corresponding to the position above the rotating sleeve. A fourth thrust bearing is fitted on the outside of the column between the locking nut and the upper end of the rotating sleeve. A mounting base is fixedly installed on the upper outside of the column corresponding to the position above the locking nut. The jack is mounted on the upper side of the mounting base.

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